CODEWITHSUNDEEP
javaregex
74H1R
74H1R

Reputation: 3514

Regex of validating must contain alphanumerics

I want to make a regex that must have atlease one number and one alphabet.

onlyText will not math. But onlyText123 matches.

Upvotes: 0

Views: 700

Answers (2)

Pshemo
Pshemo

Reputation: 124225

You can try something like this

String p= "\\w*([a-zA-Z]\\d|\\d[a-zA-Z])\\w*";

System.out.println("1a".matches(p));//true
System.out.println("a1".matches(p));//true
System.out.println("1".matches(p));//false
System.out.println("a".matches(p));//false

([a-zA-Z]\\d|\\d[a-zA-Z]) == letter then number OR number then letter

and before and after it can (but don't have to) be letters and digits (\\w)

Upvotes: 0

buckley
buckley

Reputation: 14089

Here you go

^(?=.*[a-zA-Z])(?=.*[\d]).*$

The key is to use a technique called lookaround

Upvotes: 3

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